Fig. 1: Divergent Wolbachia strains found in Drosophila host species.

a Estimated Bayesian phylogram of the 10 A- and B-group Wolbachia strains included in the study. The phylogram was estimated using 170 single-copy genes of identical length in all genomes, spanning 135,105 bp. b Estimated Bayesian phylogram of the eight Drosophila species using 20 single-copy genes. All nodes on both trees are supported with Bayesian posterior probabilities of 1. Estimates of Wolbachia and Drosophila divergence reported in millions of years ago (MYA) are reproduced from Meany et al.⁴⁰ and Suvorov et al.¹³⁵, respectively. The Wolbachia and host trees are generally discordant, as expected with frequent Wolbachia host switching^{47,48,51,53,54}.